Thermimage (version 2.0)

Nusseltfree: Nusselt number for free convection.

Description

Nusselt number for free convection. Used in calculating heat loss by convection.

Usage

Nusseltfree(b = 0.58, m = 0.25, L = 1, Ts = 20, Ta = 20)

Arguments

b

Coefficient used in calculating Nu. b is 0.58 for upright cylinders, 0.48 for horizontal cylinders.

m

Coefficient used in calculating Nu. m=0.25 for laminar flow.

L

Characteristic dimension in metres.

Ts

Surface temperature in degrees celsius. Used in call to Grasshof() function.

Ta

Air temperature in degrees celsius. Used in call to Grasshof() function.

References

Source: Blaxter, K. 1989. Energy Metabolism in Animals and Man

Examples

## The function is currently defined as
function (b = 0.58, m = 0.25, L = 1, Ts = 20, Ta = 20) 
{
    Nu <- b * Grasshof(L, Ts, Ta)^m
    Nu
  }